The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 16, 1999
Filed:
Feb. 26, 1998
Yoshihiro Hori, Hirakata, JP;
Haruhiko Handa, Yamatotakada, JP;
Shinya Hasegawa, Uji, JP;
Masaki Ikeda, Hirakata, JP;
Matsushita Electric Industrial Co., Ltd., Osaka-fu, JP;
Abstract
The present invention provides a mechanical sensor high in sensitivity (GF) and reliability. The mechanical sensor comprises an insulating substrate, a pair of electrodes formed on the insulating substrate, and a piezoresistance element formed by connecting the electrodes. The piezoresistance element is substantially made of a glass of the PbO--SiO.sub.2 --B.sub.2 --O.sub.3 --Al.sub.2 O.sub.3 system comprising 73.1 to 86.7 wt % of PbO, 9.7 to 22.2 wt % of SiO.sub.2, 2.5 to 5.0 wt % of B.sub.2 O.sub.3 and 0.9 to 3.6 wt % of Al.sub.2 O.sub.3 and a ruthenium oxide powder dispersed in the glass. The piezoresistance element is formed by coating and baking a paste containing the ruthenium oxide powder, a powder of the glass and an organic binder.